Take partial data from one column and append to new column in .csv

In the .csv file I have, the first column has multiple data in it that I need to split and move to a new column. I want the “Computer” column to only have the computer name (ATHL-XXXXXXX) and move the “Days Remaining” to a new column, while stripping off the “Days Remaining” string and only having the number (of days remaining) in the new column. I am learning/using Python 3 for this. Any suggestions? Disappointed they retired the code coaching for Pro members. Hopefully someone will see this and help me.
Thanks in advance.